Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 7: TROUBLESHOOTING
Troubleshooting
This Troubleshooting Section has been separated into various Aqua-Hot Troubleshooting Scenarios,
which may be experienced by the heater. Each section listed below begins with the most probable cause
and remedy and proceeds to the least probable cause and remedy. This concept has been put in place to
expedite the troubleshooting process and pinpoint the problem quicker. However, if additional assistance
is needed, please feel free to contact Vehicle Systems’ Technical Support Department at 1-800-685-4298
or E-mail the issue to Vehicle Systems’ Technical Support Department by going to www.vehiclesys.com
and clicking on “Technical Support.” Also, please review the following
“KEY”
prior to troubleshooting, as it
may be helpful in understanding the abbreviations used.
After turning the
“Diesel”
switch
ON
:
TS1 - The Aqua-Hot’s
Diesel-Burner
fails to operate
TS2 - The Aqua-Hot’s
Diesel-Burner
operates (3-minute prime cycle only),
but does not ignite
TS3 - The Aqua-Hot’s
Diesel-Burner
ignites after several starting attempts
TS4 - The Aqua-Hot’s
Exhaust System
sputters
TS5 - The Aqua-Hot’s
Exhaust System
produces white smoke after ignition
TS6 - The Aqua-Hot’s
Exhaust System
produces black smoke after ignition
Other troubleshooting issues:
TS7 - The Aqua-Hot is at operating temperature, but an
Interior and/or Fresh
Water Tank Heating Zone
is not producing heat
TS8 - The Aqua-Hot is at operating temperature, however the fans of an
Interior
and/or Fresh Water Heat Exchanger
fans are not operating
TS9 - The Aqua-Hot is at operating temperature, but the
Domestic Hot Water
System
is not producing hot water
After turning the Electric switch ON:
TS10 - The Aqua-Hot’s
120 VAC Electric Heating Element
does not operate
(i.e., lack of hot water and/or interior heat)
After turning the Engine Preheat switch ON:
TS11 - The Aqua-Hot’s
Engine Preheat System
does not preheat the engine
KEY:
TS#: (i.e., TS1, TS2, ....) =
Troubleshooting Scenario 1, Troubleshooting Scenario 2, ....
Q#: (i.e., Q1, Q2,....) =
Question 1, Question 2, ....
A: =
Answer
Section
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
Page 16
